The Elco Lighting 18" High Tech Stem Extension (ET546-18B-BL) consists of a Glass Shade attached to a stem that can be manually rotated in a 358 Degree radius to display direct light to a specific area in the room, along with its full vertical capabilities. The length of the stem not only adds a fresh design to the room, but also makes rotating the glass shade more convenient. The effect allows the track head to be easily pointed into the desired direction, to get the most out of the lighting system. This light accepts a low-voltage 12V 50W MR16 bulb (sold separately) to provide directed illumination to your room.